Dynamical Photon Spheres in Charged Black Holes and Naked Singularities
arXiv:2311.08930 · doi:10.1140/epjc/s10052-024-12945-w
Abstract
To understand the nature of a black hole shadow in dynamical spacetimes, we construct an analytical model of a dynamical photon sphere in the context of the Bonnor-Vaidya spacetime. Comparing the resulting photon sphere radius with the one in Vaidya spacetime, we find that the charge always decreases the radius of the photon sphere. We also prove that a naked singularity in Bonnor-Vaidya spacetime, unlike the static Reissner-Nordstrom naked singularity, may cast a shadow, and as a result, it cannot be distinguished from a black hole through its shadow.
arXiv comment10 pages
References in corpus (32)
- Viewing the Shadow of the Black Hole at the Galactic Center
- Quintessence and black holes
- Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A
- Gravitational lensing in the strong field limit
- Calculating black hole shadows: Review of analytical studies
- Influence of a plasma on the shadow of a spherically symmetric black hole
- Reissner-Nordstrom black hole lensing
- Shadows of spherically symmetric black holes and naked singularities
- Recent developments in gravitational collapse and spacetime singularities
- Generalized Vaidya Solutions
- Concerns regarding the use of black hole shadows as standard rulers
- The Kiselev black hole is neither perfect fluid, nor is it quintessence
- Understanding photon sphere and black hole shadow in dynamically evolving spacetimes
- Exact solutions for null fluid collapse
- Dynamical surface gravity
- A radiating dyon solution
- Two-Fluid Atmosphere for Relativistic Stars
- First analytical calculation of black hole shadow in McVittie metric
- Photon sphere and shadow of a time-dependent black hole described by a Vaidya metric
- The eternal naked singularity formation in the case of gravitational collapse of generalized Vaydia spacetime
- Surrounded Vaidya Solution by Cosmological Fields
- Gravitational Collapse for the K-essence Emergent Vaidya Spacetime
- Conformal symmetries in generalised Vaidya spacetimes
- Surrounded Vaidya black holes: apparent horizon properties
- The structure of the generalized Vaidya spacetime containing the eternal naked singularity
- K-essence Emergent Spacetime as Generalized Vaidya Geometry
- Generalized Vaidya spacetime: horizons, conformal symmetries, surface gravity and diagonalization
- Charged Vaidya Solution Satisfies Weak Energy Condition
- Extraction Energy From Charged Vaidya Black Hole Via Penrose Process
- Naked Singularities in the Charged Vaidya-deSitter Spacetime
- Thermodynamics with conformal Killing vector in the charged Vaidya metric
- Charged black holes in Vaidya backgrounds: Hawking's Radiation
Cited by in corpus (12)
- The Role of Topological Photon Spheres in Constraining the Parameters of Black Holes
- Mutual Influence of Photon Sphere and Non-Commutative Parameter in Various Non-Commutative Black Holes: Part I- Towards evidence for WGC
- Weak Gravity Conjecture Validation with Photon Spheres of Quantum Corrected AdS-Reissner-Nordstrom Black Holes in Kiselev Spacetime
- Perturbations of the Vaidya metric in the frequency domain: Quasi-normal modes and tidal response
- Exact Regular Black Hole Solutions with de Sitter Cores and Hagedorn Fluid
- Formation of regular black hole from baryonic matter
- Regular Black Hole Models in the Transition from Baryonic Matter to Quark Matter
- Analyzing the Influence of Geometrical Deformation on Photon Sphere and Shadow Radius: A New Analytical Approach -Stationary, and Axisymmetric Spacetime
- Analytical approach for calculating shadow of dynamical black hole
- Generalized Vaidya Spacetime in Cotton and Conformal Killing Theories
- Homothetic Killing horizons in generic Vaidya spacetimes
- Probing Weak-Force Corrections to Black Hole Geometry via Long Range Potentials: Feinberg-Sucher and Ferrer-Nowakowski Potentials